Polymer solar cells are lightweight, flexible solar panels that can be used for wearable devices. However, toxic halogenated processing solvents used during manufacturing of these solar cells have limited their widespread adoption.
Alternatives to halogenated processing solvents are not nearly as soluble, thus requiring higher temperatures and longer processing times. Finding a way to remove the need for the halogenated processing solvents could improve organic solar cell efficiency and makeon July 24, researchers outline how improving molecular interactions between the polymer donors and the small molecule acceptors using side-chain engineering can reduce the need for halogenated processing solvents.
"To enhance the hydrophilicity of the polymer donors and reduce molecular demixing, side-chain engineering can be a plausible avenue." Researchers theorized that adding oligoethylene glycol -based side chains would improve the hydrophilicity of the polymer donors thanks to thein the side chains. A molecule with hydrophilicity is attracted to water. Differences in the hydrophilicity of the polymer donors and the small molecule acceptors can impact how they interact.
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